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Finding the Fourth Proportional to 225,930.25, 311,783.75 and 125,347.69

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Solution

The fourth proportional to 225,930.25, 311,783.75 and 125,347.69 is: 172,979.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,930.25 : 311,783.75 = 125,347.69 : x
  2. Step 2: Convert to fraction form
    225,930.25/311,783.75 = 125,347.69/x
  3. Step 3: Cross multiply
    225,930.25x = 311,783.75 × 125,347.69
  4. Step 4: Simplify right side
    225,930.25x = 39,081,372,842.04
  5. Step 5: Solve for x
    x = 39,081,372,842.04/225,930.25
  6. Step 6: Final answer
    x = 172,979.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.